When adding Slick 50 to the tranny can the level of the fluid be full or do I have to take some fluid out to put the additive in and if so, how do I take some out?

 

Skip the whole process and save your money. That stuff is garbage.

 

Stick to changing the transmission fluid, and/or use a small tube of automatic transmission additive, such as that made from Lucus. Small tube, and no need to drain any transmission fluid out to add it.

I did not know that Slick 50 was still on the market.